Max Minelli - My favorite rapper, but I'd recommend you get stuff pre-2004.... his voice and style changed after that, but he's still pretty good. Lay-Lo - Simple & Plain (a duo album with the rapper J-Von) is my favorite Rap CD.
Concentration Camp - Group led by C-Loc, includes Max Minelli and various line-ups over the years. Any Camp CD is good.
Kevin Gates - sick as fuck... I think he might've only started recently, but he's had 3 mixtapes in the last few months that are all tight.
Box - Has one CD called Inboxicated that's pretty good.
Handy - Rap Hustlin.... he sounds sort of similar to Soulja Slim, died in a car crash just before his debut was released.
Lil Cali - from Ponchatoula, but his music sounds pretty much Baton Rouge. All of his CDs are straight.
Savage - A producer for Trill Ent., but he's a good rapper too.
Da GANG - Jiggalaters Vol. 1 - The CD came out in like 2001, but it started the whole Jig movement, so you should probably listen to it.
^^The above isn't really real "Jigg music," or exemplary of it. For groups with more of that sound, check out Down Bad, Thug Brothers, Da Taliban, or the Big Jay - Pyrex Radio Mixtapes. Also, Nussie's really popular right now; he's a weak lyricist, but you know people like him like a Gucci Mane type rapper. He's okay though.